Warp beam



Aug. 7, 1951 W. GROB WARP BEAM Filed July 30, 1947 /N l/E N TOR:

Patented Aug. 7, 1951 Willy Grob, Zurich, Switzerland ApplicationJuly 30, 1947, Serial No. 764,647

' In Switzerland May 8, 1946 Section 1, Public Law 690, August s, 1946 Patent expires May 8, 1966 My invention has. for its object to provide a warp beam the weight of which is considerably reduced in comparison to known Warp beams and which is not weakened by slots or grooves for locating the ends of the warp threads.

The warp beam according to the present invention is of tubular form and comprises a cylindrical shell provided with a jacket, in which a longitudinal groove is formed for the purpose of accommodating a beam bar. The latter, as known, serves for locating the ends of the warp threads.

In such relatively simple and cheap arrangement and provision of a longitudinal beam groove serving to locate the ends of the warp threads, the statically favourable cross-section of the beam remains intact so as to permit of using as beam a comparatively thin-walled cylindrical tube, e. g. of steel or aluminum, with a view of saving Weight, which latter point is of particular importance for handling and transporting.

The jacket, formed, e. g. of Wooden staves, suitably is made adjustable in the axial direction of the warp beam so as to permit of mounting the two end flanges (commonly used when winding long threads upon the warp beam, and which are adjusted according to the width of warp) immediately upon the beam, in abutment with the ends of the jacket. Such arrangement permits of substantially reducing the wear (which results when using wooden beams from the repeated axial displacement of the flanges, and which finally renders the wooden beam unfit for further use) so as to correspondingly decrease the cumbersome repairs and readjustments, resulting from such Wear, for securing the true running of the end flanges.

An embodiment of the invention comprising a jacket formed of staves and adjustable in the axial direction of the beam is shown, by way of example, in the annexed drawing, in which:

Fig. 1 shows an end elevation of the warp beam, partly in section,

Fig. 2 the developed jacket,

Fig. 3 a view of a jacket-stave, and

Fig. 4 an extension stave of the jacket.

Figs. 5 and 6 illustrate details of the ends of the jacket.

The tube l of the beam suitably is made of metal, and is enclosed on the outside by the jacket preferably comprising parallel wood staves 2 and extension staves 3 arranged between the latter at the end portions thereof. staves 2 are provided with spaced cross slots 4, and the extension staves 3 with an elongated slot 5. Slots 4,

6 Claims. (01. 2425426) 5 serve for accommodating ties 6, i. e. steel bands, which are secured by studs 1 to the two terminal jacket staves 2. The elongated slots 5 in the extension staves 3 permit of correspondingly displacing the latter relative to staves 2 to adjust the jacket in the axial direction of the beam Within the practical limits set by the warp widths.

The jacket formed in the manner described, which may be rolled up, is so dimensioned, with respect to the circumference of the cylindrical jacket of tube I, that after mounting the jacket, a longitudinal groove 8 is formed in Fig. 1 on top of tube l between the two terminal staves 2 of the jacket, the two terminal staves being secured to tube l, by means such as stud l. A plurality of spaced studs 9 are screwed into one of the two terminal staves 2, and project into the said groove 8.

When the warp beam described is used, e. g., for silk or rayon warp-threads, studs 9 projecting into groove 8 serve as abutments for a beam bar I0 which is to be inserted into groove 8 (Fig. 5). Bundles of warp-threads H in such case are fixed to the said bar H] by hold-back knots [2.

When the warp beam is used for warp-threads of cotton or artificial wool, the said studs 9 are removed from the respective terminal stave 2 to permit of springing the beam bar Ill (which serves for clamping the ends of the warpthreads) into groove 8 (Fig. 6).

Warp-threads of any material thus may be located on the warp beam by changing the beam bar.

In the preferred embodiment described, solid staves 2 and 3 are used for building up the jacket; the said staves, however, also may be of different cross-section.

I claim:

1. A warp beam comprising a hollow support member having a cylindrical jacket surface, a covering on said surface composed of longitudinal bars, said covering being provided on its outer surface with a longitudinally extending groove, the length of said groove corresponding to the length of the winding, a retaining .bar for insertion in said groove, said groove and bar serving together for fastening the beginnings of the warp threads.

2. A warp beam according to claim 1, and in which the jacket is comprised by axially adjustable extension bars arranged between other adjacent longitudinal bars which are connected toether.

3. Warp beam according to claim 2 and in 3 which an axially adjustable extension bar is provided between each of the ends of said other longitudinal bars.

4. A warp beam according to claim 1, and in which the jacket is comprised by axially adjustable extension bars arranged between other adjacent longitudinal bars,t'the extension barszand said longitudinal bars being united by common connecting members.

5. A warp beam according to claim 1, and In which the jacket is comprised by axially adjustable extension bars arranged between other adjacent longitudinal bars the extenSionbars and said longitudinal bars being unite'd' 'by comanon connecting members, said extension bars 'having longitudinal slots through which thezconnectin'g members pass.

6. A warp beam according to claim .1,..and..in which the jacket is comprised by axially adjustable extension bars arranged between other ad- 4 jacent longitudinal bars, which are connected together, said groove being provided between two of said longitudinally extending bars which are spaced apart laterally, said two longitudinally extending bars being fastened to said hollow support member.

" WILLY GROB.

REFERENCES CITED The following references are of record in the .lifile 70f this patent:

vUNITED STATES PATENTS Number Name Date 21,940,638 West Dec. 19, 1933 .-.FOREIGN PATENTS Number Country Date 26,429 Denmark July 31, 1920 "204,486 Great Britain Oct. 4, 1923 699,060 France .Dec. 8, 1930 

